Fix broken bold markup in cms.md (#4271)

Author: Krinkle

src/content/en/2024/cms.md

@@ -686,7 +686,7 @@ These are some of the enhancements that led to these results:
 - **WordPress 6.0**: Improvements to the <a hreflang="en" href="https://make.wordpress.org/core/2022/04/29/caching-improvements-in-wordpress-6-0/">WordPress Caching API</a>, <a hreflang="en" href="https://make.wordpress.org/core/2022/04/28/taxonomy-performance-improvements-in-wordpress-6-0/">taxonomy term queries</a>, and performance increase for sites with <a hreflang="en" href="https://make.wordpress.org/core/2022/05/02/performance-increase-for-sites-with-large-user-counts-now-also-available-on-single-site/">large user counts</a>
 - **WordPress 6.3**: More than <a hreflang="en" href="https://make.wordpress.org/core/2023/08/07/wordpress-6-3-performance-improvements/">170 performance updates</a> merged into the core, improvements in LCP and TTFB for block and classic themes, added support for the *<a hreflang="en" href="https://make.wordpress.org/core/2023/07/13/image-performance-enhancements-in-wordpress-6-3/">fetchpriority="high"</a>* attribute on images, introduced script loading strategies, which adds support for loading scripts with defer or async.
 - **WordPress 6.4:** Merged over 100 performance updates and implemented <a hreflang="en" href="https://make.wordpress.org/core/2023/10/17/script-loading-changes-in-wordpress-6-4/">script loading strategies</a> for frontend scripts in core and bundled themes.
-- **WordPress 6.5: **Introduced <a hreflang="en" href="https://make.wordpress.org/core/2024/04/23/wordpress-6-5-performance-improvements/">multiple performance improvements</a>, including support for the AVIF image format and a faster localization system.
+- **WordPress 6.5:** Introduced <a hreflang="en" href="https://make.wordpress.org/core/2024/04/23/wordpress-6-5-performance-improvements/">multiple performance improvements</a>, including support for the AVIF image format and a faster localization system.
 
 The team also released the <a hreflang="en" href="https://wordpress.org/plugins/performance-lab/">Performance Lab</a> plugin, which is a collection of performance-related "feature projects" that may eventually be merged into the WordPress core software: